Save PHP variables to a text file

Question

I was wondering how to save PHP variables to a txt file and then retrieve them again.

Example:

There is an input box, after submitted the stuff that was writ

Answer 1

This should do what you want, but without more context I can't tell for sure.

Writing $text to a file:

$text = "Anything";
$var_str = var_export($text, true);
$var = "";
file_put_contents('filename.php', $var);

Retrieving it again:

include 'filename.php';
echo $text;